gRPC 1.53.0 Release Notes – Core, C++, C#, Python, and Ruby Updates

gRPC is a modern open‑source high‑performance RPC framework that can run in any environment. Version 1.53.0 has been released, bringing a collection of enhancements, improvements, and bug fixes.

Core

xDS: Fixed a crash when removing the last endpoint from a weighted_target's last locality ( #32592 ).

Filter stack: Batch‑forward peer name via recv_initial_metadata ( #31933 ).

[EventEngine] Added advice against blocking work in callbacks ( #32397 ).

[http2] Do not disconnect when metadata limits are exceeded ( #32309 ).

xDS: Reject aggregated clusters with an empty cluster list ( #32238 ).

Fixed Python epoll1 fork support ( #32196 ).

Server: Introduced ServerMetricRecorder API and moved per‑call reporting from C++ interceptors to C‑core filters ( #32106 ).

[EventEngine] Added invalid handle types to the public API ( #32202 ).

[EventEngine] Refactored EventEngine Test Suite: Part 1 ( #32127 ).

xDS: Fixed total weight handling for WeightedClusters ( #32134 ).

C++

Updated the minimum MSVC version to 2019 ( #32615 ).

Used CMake variables as paths in the pkg‑config file ( #31671 ).

C#

Grpc.Tools: Use x86 protoc binary on arm64 Windows ( #32017 ).

Python

Added support for Python 3.11 on aarch64 ( #32270 ).

Included .pyi stub files ( #32268 ).

De‑experimentalized wait‑for‑ready ( #32143 ).

De‑experimentalized compression ( #32138 ).

Ruby

[ruby] Added pre‑compiled binaries for Ruby 3.2 and deprecated them in Ruby 2.6 ( #32089 ).

For full details, see the release notes: https://github.com/grpc/grpc/releases/tag/v1.53.0